No.1394 (ND)

 No.1394 Nicolas Dupont (Франция) Оригинальные Retro & PG задачи JF – R2019-20

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 No.1394 Nicolas Dupont France original – 27.03.2019 Solutions: (click to show/hide) white Bf1c1 Ke1 Qd1 Ph2g2f2e2d2c2b2a2 Sg1b1 Rh1a1 black Bf8c8 Ke8 Qd8 Ph7g7f7e7d7c7b7a7 Sg8b8 Rh8a8 PG 12.5                                   (16+15) Annan Chess 1.e2-f3 a7-a4 2.Bf1-a6 d7-d3 3.d2-a5 Qd8-d4 4.Ba6-a7 Bc8-d7 5.Ba7*b8 b7-b5 { }6.Bb8-a7 0-0-0 7.Bc1-d2 e7-e5 8.Bd2-e2 Bf8-a3 9.Be2-f1 Qd4-b4 10.Ba7-e3 Bd7-d4 { }11.b2-c4 Rd8-d7 12.a2-b2 Ba3-a2 13.Be3-c1 {dia (C+ Jacobi (Author))} Interchange of white Bishops vs color-change of black Bishops. The main motivation for the interchange is that Sb8 must be home-captured at move 5 (there is no black spare move and 7 black moves occur after the capture of Sb8), and that only the Bf1 can do that safely. The main motivation for the color-change is that Bc8 can’t reach square a2 in 2 moves, as Bc8-e6 must be played before 0-0-0, hence before e7-e5 (as Pe7 is just beyond Ke8), but in that case Be6-a2 is annan-illegal. (Author)

1 комментарий: No.1394 (ND)

1. seetharaman пишет:

All bishops changing color! Super theme for Annan chess!